Reel changer

Abstract

Roll changer for feeding a material web wound on a material roll ( 2, 3, 4 ) into a web-processing machine having a support frame ( 1 ), in which at least one material roll ( 2, 3, 4 ) is mounted so it is rotatable around its rotational axis, at least three material rolls ( 2, 3, 4 ) being provided, whose rotational axes (R) are each oriented parallel to one another, and which are situated so they are pivotable around a shared pivot axis (D) parallel to their rotational axes (R). Preferably, a pair of support arms ( 6 ) is provided in each case for the rotatable mounting of the material rolls ( 2, 3, 4 ) around their particular rotational axis (R), between which the particular material roll ( 2, 3, 4 ) is mounted so it is rotatable, and which each project radially from the pivot axis (D) parallel to the particular rotational axis (R). According to the present invention, a roll drive ( 23 ) is provided in the unwinding area, which sets the material roll ( 2 ) located in the unwinding area into rotation, or brakes it.

1 - 10 . (canceled) 
   
   
       11 . A roll changer for feeding a material web wound on a material roll into a web-processing machine having a support frame, in which at least three material rolls are mounted so they are rotatable, whose rotational axes are each oriented parallel to one another, and which are situated so they are pivotable around a shared pivot axis parallel to their rotational axes, in a first pivot position of the at least three material rolls, one material roll being located in an unwinding area, in which the material web may be fed from said material roll to the web-processing machine, and a pair of support arms being provided for the rotatable mounting of said at least three material rolls around its particular rotational axes, between which the particular material roll is mounted so it is rotatable, and which each project radially from the pivot axis parallel to the particular rotational axis, wherein a cantilever projects from each of the support arms, a pre-tensioning unit for receiving the free end of the material roll held by the affected pair of support arms being held between the cantilevers of the support arms of a pair of support arms. 
   
   
       12 . The roll changer according to  claim 11 , wherein a roll drive may be provided in the unwinding area, which sets the material roll located in the unwinding area into rotation, or brakes it. 
   
   
       13 . The roll changer according to  claim 12 , wherein the roll drive is a belt applied to the material roll 
   
   
       14 . The roll changer according to  claim 11 , wherein those support arms which are located on the same side of the material rolls are implemented as a modular unit, which is mounted so it is pivotable around the pivot axis parallel to the particular rotational axes of the material rolls. 
   
   
       15 . The roll changer according to  claim 11 , wherein three material rolls are provided, whose rotational axes define an equilateral triangle in their points of intersection with a plane perpendicular to the rotational axes.